Work-supporting device for broaching machines



G. W BWMI'M'E WORK SUPPURTENG DEVICE FOR BRUACHHJG MACHINES.

APPLICATION FILED APR. 15. I920.

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WORK SUPPORTING DEVICE FOR BROACHING MACHINES.

APPLICATION FILED APR. 15, 1920- ]Patenteal Oct. W, W22

2 SHEETSSHEET 2.

Patented Met. 10, 1922.

OLIVER W. BONNAFEFOF CENTRAL FALLS, NIACI-IINE 6b TOOL COMPANY, 013 HUDSON, li'IASSJtCl-IUSETTS, A GORFQRATIONOF.

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WORK-SUPPORTING DEVICE FOR BRQACHIING .TJIJLCX'IIIQES- Application filed April 15,

To all whom it "may concern Be it known that I, OLIVER W. BoNNArn,

a citizen of the United States, residing at 915 the broaching operation. It is the object ofmy invention to provide a work-supporting device so constructed that the operator can insert a piece of work in one fixture while the machine is operating upon a duplicate 20 piece of workheld in a second fixture. By

this construction the machine may be operated almost continuously, increasing the out put of the machine and materially decreasing the labor cost.

My invention further relates to arrangements and combinations of parts hereinafter described and more particularly pointed out in the appended claims.

preferred form of my invention is shown in the drawings, in which Fig. 1 is a plan view of a portion of a broaching machine with my improvements applied thereto, certain parts being shown in section on the line 1--1. of Fig. 3.

Fig. 2 is a side elevation of the porting device;

Fig. 3 is a left-hand end elevation of the parts shown in Fig. 1;.

Fig. 4 is a detail vertlcal sectional vlew taken along the line 41 in Fig. 3; and

Fig. 5 is a sectional elevation taken along the line 55 in Fig. 4:.

Referring to the drawings, I have shown a portion of a broaching machine having a bed or frame 10, in which a draw head 11 is movable longitudinally by means of a threaded rod or shaft 12. A plate or cast ing 13 (Figs. 1 and 5) is provided with a a boss or projection 14 fitting closely in the opening 15 in the frame 10 through which the broaching tool T is operated. The plate 13is rigidly secured to the frame 10 by a plurality of bolts 16, and is also provided work-sup may be also provided with a with one or the holding work.

enabled to keep the 1920. Serial in). 3mm.

with-a second projection 17 having a bushing 18 in which a stud19 is freely rotatable.

The stud 19 is 20 (Fig. 3) by screws 20" ing for said plate. The stud19extends through the face plate 20 and bushing 18 and is held in position by a washer 21 and nut 22.

The face plate 20 is provided Witha pair and forms a beareither one of which may be aligned with the opening 15 in the frame 10. The face plate is also provided with additional oppositely disposed holes 25 and 26, in which hardened bushings 27 are preferably inserted. These openings 25 and 26. are aligned with an opening 28 in the upper portion of the fixed plate 13, which opening bushing 29. A locking pin 30 may be inserted through the bushing 29 and oneof the bushings 27 tohold the face plate 20 rigidly in position other of its openings 23 or 24: aligned with the opening 15 and the broaching tool T.

Special worlr holding fixtures 31 of any desired type may be secured to the face plate 20 by clamping screws 32. The work fixture shown in the drawings is merely illustrative and forms my present invention.

Having described the construction of my improved work-supporting device, the operation thereof is follows:

The operator places a piece of Work in one of the fixtures 31 and then turns the plate 20 so that the work is aligned with the opening 15. The operator then inserts the broaching tool T and connects the same with the draw head 11, after which the machine is started to pull the tool T through the 11 is again in its initial position, he reinthe operation serts the broaching tool and 1s repeated. In this way, the operator is machine in practically fixed to a double face plate of oppositely disposed openings 23 and 24,

no part of During this operation, the operator.

I in the art within the spirit and scope of my invention as set forth in the claim and I do not wish to be otherwise limited to the details herein disclosed, but what I claim is A broaching meachine having in combination, a frame a breaching tool mounted therein, the end of said frame having an opening through which said tool is operable,

a work supporting plate rotatably mounted on the end of said frame and having a lixed bearing in said frame, said plate ha \in g two openings spaced apart therein, a lot-hing device efl'ective to look said plate in either of two operative positions with one or the other of said openings substantially aligned with the tool opening in the end of: said frame, and means to iiulependently serure pieces of work in fixed position on said plate one at each of the two openings therein.

In testimony whereot I. have hereunto affixed my signature.

OLIVER \V. BONNAFE. 

